The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2

Citation
Wwm. Allison et al., The atmospheric neutrino flavor ratio from a 3.9 fiducial kiloton-year exposure of Soudan 2, PHYS LETT B, 449(1-2), 1999, pp. 137-144
Citations number
17
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICS LETTERS B
ISSN journal
0370-2693 → ACNP
Volume
449
Issue
1-2
Year of publication
1999
Pages
137 - 144
Database
ISI
SICI code
0370-2693(19990304)449:1-2<137:TANFRF>2.0.ZU;2-5
Abstract
We report a measurement of the atmospheric neutrino flavor ratio, R, using a sample of quasi-elastic neutrino interactions occurring in an iron medium . The flavor ratio (tracks/showers) of atmospheric neutrinos in a 3.9 fiduc ial kiloton-year exposure of Soudan 2 is 0.64 +/- 0.11(stat.) +/- 0.06(syst .) of that expected. Important aspects of our main analysis have been check ed by carrying out two independent, alternative analyses; one is based upon automated scanning, the other uses a multivariate approach for background subtraction. Similar results are found by all three approaches. (C) 1999 El sevier Science B.V. All rights reserved.